Moisture detection system
a moisture detection and moisture detection technology, applied in the field of aircraft, can solve the problems of affecting the service life of composite materials, affecting the appearance of the aircraft, and affecting the service life of various components of the aircraft,
Active Publication Date: 2019-09-24
THE BOEING CO
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Problems solved by technology
Further, composite materials provide a longer service life for various components in an aircraft.
One problem with these composite sandwich panels and other structures that have porous materials is moisture.
Moisture in a composite sandwich panel can cause bubbling.
Bubbling is aesthetically undesirable especially when the bubbling occurs in locations visible to passengers, such as in the passenger cabin within a commercial airplane.
This occurrence in a structure in the passenger cabin is a problem that can disrupt the delivery of a commercial airplanes when bubbling is discovered.
Further, the discovery of bubbling in composite sandwich panels during production of a commercial airplane may result in delays.
Reworking composite sandwich panels with bubbling increases the time and expense for producing an airplane.
Disruption in the production line may occur.
Further, moisture within a composite sandwich panel may not immediately manifest itself in the form of bubbling.
Method used
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[0032]The illustrative examples recognize and take into account one or more different considerations. For example, the illustrative examples recognize and take into account that measuring moisture in composite sandwich structures that employ foam or honeycomb cores may be more difficult than desired. The illustrative examples recognize and take into account that current techniques for moisture detection are unable to measure a level of moisture in a composite sandwich structure. The illustrative examples recognize and take into account that current techniques are unable to map the level of moisture in a composite sandwich structure.
[0033]Thus, the illustrative examples provide a method, apparatus, and system for detecting moisture. In one illustrative example, a moisture detection system comprises an electromagnetic radiation system, an infrared detector system, and a controller. The electromagnetic radiation system is configured to transmit electromagnetic radiation, and the infrar...
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Abstract
A method and system for an aerospace vehicle. A pulse of electromagnetic radiation is transmitted into the composite sandwich panel such that the composite sandwich panel is heated above an ambient temperature. An amount of infrared radiation generated in the composite sandwich panel is detected in response to transmitting the pulse of electromagnetic radiation into the composite sandwich panel using a time window selected to detect the amount of infrared radiation when the pulse of electromagnetic radiation heats the composite sandwich panel. The amount of infrared radiation detected indicates a level of moisture in the composite sandwich panel.
Description
CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is related to the following U.S. patent application Ser. No. 15 / 787,014, entitled “ Synchronized Phased Array and Infrared Detector System for Moisture Detection,” filed even date herewith, and incorporated herein by reference in its entirety.BACKGROUND INFORMATION[0002]1. Field[0003]The present disclosure relates generally to aircraft and, in particular, to detecting moisture in porous materials in aircraft. Still more particularly, the present disclosure relates to a method, apparatus, and system for detecting moisture in panels in aircraft.[0004]2. Background[0005]Aircraft are being designed and manufactured with greater and greater percentages of composite materials. Composite materials are used in aircraft to decrease the weight of the aircraft. This decreased weight improves performance features such as payload capacities and fuel efficiencies. Further, composite materials provide a longer service life for various co...
Claims
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IPC IPC(8): G01N21/3554G01N25/72G01N22/04
CPCG01N25/72G01N22/04G01N21/3554G01N2201/0696G01N21/3563G01N23/02B64C1/40G01F23/00
Inventor SAFAI, MORTEZAWANG, XIAOXI
Owner THE BOEING CO